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		<h1 class="hero__h1">Steem Developer Portal  - Services</h1>
		
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		<section id="services-steemit" class="row services-steemit">
			<h3>
				<a id="services-steemit">
					Steemit.com
					
				</a>
			</h3>
			

			<h4 id="steemitcom-endpoints">steemit.com endpoints</h4>

<p>Steemit.com offers a few endpoints for getting common data. User profile and post JSON data is very convenient and simple by appending .json
to your request.</p>

<p>Getting a particular user profile JSON:</p>

<div class="highlighter-rouge"><pre class="highlight"><code>https://steemit.com/@curie.json
</code></pre>
</div>

<p>User object</p>
<div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="w">
   </span><span class="nt">"user"</span><span class="p">:{</span><span class="w">
      </span><span class="nt">"id"</span><span class="p">:</span><span class="mi">81544</span><span class="p">,</span><span class="w">
      </span><span class="nt">"name"</span><span class="p">:</span><span class="s2">"curie"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"owner"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"weight_threshold"</span><span class="p">:</span><span class="mi">1</span><span class="p">,</span><span class="w">
         </span><span class="nt">"account_auths"</span><span class="p">:[],</span><span class="w">
         </span><span class="nt">"key_auths"</span><span class="p">:[[</span><span class="s2">"STM69WGR1yhUdKrnzwQLDPnXrW9kaAERwHze8Uvtw2ecgRqCEjWxT"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">]]</span><span class="w">
      </span><span class="p">},</span><span class="w">
      </span><span class="nt">"active"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"weight_threshold"</span><span class="p">:</span><span class="mi">1</span><span class="p">,</span><span class="w">
         </span><span class="nt">"account_auths"</span><span class="p">:[],</span><span class="w">
         </span><span class="nt">"key_auths"</span><span class="p">:[[</span><span class="s2">"STM5GAbbS84ViMEouJL3LKcM8VZzPejn68AfPaYaLZZDdmy98kwU5"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">]]</span><span class="w">
      </span><span class="p">},</span><span class="w">
      </span><span class="nt">"posting"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"weight_threshold"</span><span class="p">:</span><span class="mi">1</span><span class="p">,</span><span class="w">
         </span><span class="nt">"account_auths"</span><span class="p">:[[</span><span class="s2">"steemauto"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">]],</span><span class="w">
         </span><span class="nt">"key_auths"</span><span class="p">:[[</span><span class="s2">"STM5cmuKw6EPkZWeVNXcZorKtattZTX5wSopcRb4xNe6VhRKjETgv"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">]]</span><span class="w">
      </span><span class="p">},</span><span class="w">
      </span><span class="nt">"memo_key"</span><span class="p">:</span><span class="s2">"STM7ZBi61xYz1b9STE1PHcAraPXJbvafzge3AcPjcfeq4XkKtM2At"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"json_metadata"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"profile"</span><span class="p">:{</span><span class="w">
            </span><span class="nt">"profile_image"</span><span class="p">:</span><span class="s2">"https://i.imgur.com/Mjewc66.jpg"</span><span class="p">,</span><span class="w">
            </span><span class="nt">"name"</span><span class="p">:</span><span class="s2">"Curie"</span><span class="p">,</span><span class="w">
            </span><span class="nt">"about"</span><span class="p">:</span><span class="s2">"Discovering exceptional content. "</span><span class="p">,</span><span class="w">
            </span><span class="nt">"location"</span><span class="p">:</span><span class="s2">"Worldwide"</span><span class="p">,</span><span class="w">
            </span><span class="nt">"website"</span><span class="p">:</span><span class="s2">"http://curiesteem.com"</span><span class="w">
         </span><span class="p">}</span><span class="w">
      </span><span class="p">},</span><span class="w">
      </span><span class="nt">"proxy"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_owner_update"</span><span class="p">:</span><span class="s2">"1970-01-01T00:00:00"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_account_update"</span><span class="p">:</span><span class="s2">"2018-02-28T14:21:24"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"created"</span><span class="p">:</span><span class="s2">"2016-09-02T10:44:24"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"mined"</span><span class="p">:</span><span class="kc">false</span><span class="p">,</span><span class="w">
      </span><span class="nt">"recovery_account"</span><span class="p">:</span><span class="s2">"anonsteem"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_account_recovery"</span><span class="p">:</span><span class="s2">"1970-01-01T00:00:00"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"reset_account"</span><span class="p">:</span><span class="s2">"null"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"comment_count"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"lifetime_vote_count"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"post_count"</span><span class="p">:</span><span class="mi">1042</span><span class="p">,</span><span class="w">
      </span><span class="nt">"can_vote"</span><span class="p">:</span><span class="kc">true</span><span class="p">,</span><span class="w">
      </span><span class="nt">"voting_power"</span><span class="p">:</span><span class="mi">8927</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_vote_time"</span><span class="p">:</span><span class="s2">"2018-06-21T19:42:33"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"balance"</span><span class="p">:</span><span class="s2">"24.519 STEEM"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"savings_balance"</span><span class="p">:</span><span class="s2">"0.000 STEEM"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"sbd_balance"</span><span class="p">:</span><span class="s2">"36.736 SBD"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"sbd_seconds"</span><span class="p">:</span><span class="s2">"11732264931"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"sbd_seconds_last_update"</span><span class="p">:</span><span class="s2">"2018-06-21T19:35:00"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"sbd_last_interest_payment"</span><span class="p">:</span><span class="s2">"2018-06-15T14:05:03"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"savings_sbd_balance"</span><span class="p">:</span><span class="s2">"0.000 SBD"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"savings_sbd_seconds"</span><span class="p">:</span><span class="s2">"0"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"savings_sbd_seconds_last_update"</span><span class="p">:</span><span class="s2">"1970-01-01T00:00:00"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"savings_sbd_last_interest_payment"</span><span class="p">:</span><span class="s2">"1970-01-01T00:00:00"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"savings_withdraw_requests"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"reward_sbd_balance"</span><span class="p">:</span><span class="s2">"0.000 SBD"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"reward_steem_balance"</span><span class="p">:</span><span class="s2">"0.000 STEEM"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"reward_vesting_balance"</span><span class="p">:</span><span class="s2">"481.354811 VESTS"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"reward_vesting_steem"</span><span class="p">:</span><span class="s2">"0.237 STEEM"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"vesting_shares"</span><span class="p">:</span><span class="s2">"128367480.795804 VESTS"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"delegated_vesting_shares"</span><span class="p">:</span><span class="s2">"0.000000 VESTS"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"received_vesting_shares"</span><span class="p">:</span><span class="s2">"17069919.621493 VESTS"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"vesting_withdraw_rate"</span><span class="p">:</span><span class="s2">"9672265.370398 VESTS"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"next_vesting_withdrawal"</span><span class="p">:</span><span class="s2">"2018-06-24T14:01:51"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"withdrawn"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"to_withdraw"</span><span class="p">:</span><span class="s2">"125739449815180"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"withdraw_routes"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"curation_rewards"</span><span class="p">:</span><span class="mi">79730650</span><span class="p">,</span><span class="w">
      </span><span class="nt">"posting_rewards"</span><span class="p">:</span><span class="mi">168964559</span><span class="p">,</span><span class="w">
      </span><span class="nt">"proxied_vsf_votes"</span><span class="p">:[</span><span class="s2">"1753316906111"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">],</span><span class="w">
      </span><span class="nt">"witnesses_voted_for"</span><span class="p">:</span><span class="mi">1</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_post"</span><span class="p">:</span><span class="s2">"2018-06-21T18:06:57"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_root_post"</span><span class="p">:</span><span class="s2">"2018-06-19T13:16:15"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"average_bandwidth"</span><span class="p">:</span><span class="s2">"540385456623"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"lifetime_bandwidth"</span><span class="p">:</span><span class="s2">"33717478000000"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_bandwidth_update"</span><span class="p">:</span><span class="s2">"2018-06-21T19:42:33"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"average_market_bandwidth"</span><span class="p">:</span><span class="s2">"83841450748"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"lifetime_market_bandwidth"</span><span class="p">:</span><span class="s2">"8042800000000"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_market_bandwidth_update"</span><span class="p">:</span><span class="s2">"2018-06-19T04:21:42"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"vesting_balance"</span><span class="p">:</span><span class="s2">"0.000 STEEM"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"reputation"</span><span class="p">:</span><span class="s2">"418378051905700"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"transfer_history"</span><span class="p">:[],</span><span class="w">
      </span><span class="nt">"market_history"</span><span class="p">:[],</span><span class="w">
      </span><span class="nt">"post_history"</span><span class="p">:[],</span><span class="w">
      </span><span class="nt">"vote_history"</span><span class="p">:[],</span><span class="w">
      </span><span class="nt">"other_history"</span><span class="p">:[],</span><span class="w">
      </span><span class="nt">"witness_votes"</span><span class="p">:[</span><span class="s2">"curie"</span><span class="p">],</span><span class="w">
      </span><span class="nt">"tags_usage"</span><span class="p">:[],</span><span class="w">
      </span><span class="nt">"guest_bloggers"</span><span class="p">:[]</span><span class="w">
   </span><span class="p">},</span><span class="w">
   </span><span class="nt">"status"</span><span class="p">:</span><span class="s2">"200"</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre>
</div>

<p>Getting a particular post JSON:</p>

<div class="highlighter-rouge"><pre class="highlight"><code>https://steemit.com/curation/@curie/the-daily-curie-12-13-feb-2017.json
</code></pre>
</div>

<p>Post object</p>
<div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="w">
   </span><span class="nt">"post"</span><span class="p">:{</span><span class="w">
      </span><span class="nt">"id"</span><span class="p">:</span><span class="mi">1720643</span><span class="p">,</span><span class="w">
      </span><span class="nt">"author"</span><span class="p">:</span><span class="s2">"curie"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"permlink"</span><span class="p">:</span><span class="s2">"the-daily-curie-08-09-jan-2017"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"category"</span><span class="p">:</span><span class="s2">"curation"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"parent_author"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="w">
      </span><span class="nt">"parent_permlink"</span><span class="p">:</span><span class="s2">"curation"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"title"</span><span class="p">:</span><span class="s2">"The Daily Curie (08-09 Jan 2017)"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"body"</span><span class="p">:</span><span class="s2">"&lt;center&gt;https://s29.postimg.org/dgtsfe7if/curie2.png&lt;/center&gt;\n## Introduction\n[Curie](https://steemit.com/steemit/@donkeypong/announcing-project-curie-bringing-rewards-and-recognition-to-steemit-s-undiscovered-and-emerging-authors)  is a commu ..."</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_update"</span><span class="p">:</span><span class="s2">"2017-01-09T12:20:15"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"created"</span><span class="p">:</span><span class="s2">"2017-01-09T12:20:15"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"active"</span><span class="p">:</span><span class="s2">"2017-01-11T22:44:57"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"last_payout"</span><span class="p">:</span><span class="s2">"2017-02-09T14:40:54"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"depth"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"children"</span><span class="p">:</span><span class="mi">36</span><span class="p">,</span><span class="w">
      </span><span class="nt">"children_rshares2"</span><span class="p">:</span><span class="s2">"0"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"net_rshares"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"abs_rshares"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"vote_rshares"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"children_abs_rshares"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"cashout_time"</span><span class="p">:</span><span class="s2">"1969-12-31T23:59:59"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"max_cashout_time"</span><span class="p">:</span><span class="s2">"1969-12-31T23:59:59"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"total_vote_weight"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"reward_weight"</span><span class="p">:</span><span class="mi">10000</span><span class="p">,</span><span class="w">
      </span><span class="nt">"total_payout_value"</span><span class="p">:</span><span class="s2">"0.000 SBD"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"curator_payout_value"</span><span class="p">:</span><span class="s2">"0.000 SBD"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"author_rewards"</span><span class="p">:</span><span class="mi">0</span><span class="p">,</span><span class="w">
      </span><span class="nt">"net_votes"</span><span class="p">:</span><span class="mi">519</span><span class="p">,</span><span class="w">
      </span><span class="nt">"root_comment"</span><span class="p">:</span><span class="mi">1720643</span><span class="p">,</span><span class="w">
      </span><span class="nt">"mode"</span><span class="p">:</span><span class="s2">"archived"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"max_accepted_payout"</span><span class="p">:</span><span class="s2">"0.000 SBD"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"percent_steem_dollars"</span><span class="p">:</span><span class="mi">10000</span><span class="p">,</span><span class="w">
      </span><span class="nt">"allow_replies"</span><span class="p">:</span><span class="kc">true</span><span class="p">,</span><span class="w">
      </span><span class="nt">"allow_votes"</span><span class="p">:</span><span class="kc">true</span><span class="p">,</span><span class="w">
      </span><span class="nt">"allow_curation_rewards"</span><span class="p">:</span><span class="kc">true</span><span class="p">,</span><span class="w">
      </span><span class="nt">"url"</span><span class="p">:</span><span class="s2">"/curation/@curie/the-daily-curie-08-09-jan-2017"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"root_title"</span><span class="p">:</span><span class="s2">"The Daily Curie (08-09 Jan 2017)"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"pending_payout_value"</span><span class="p">:</span><span class="s2">"0.000 SBD"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"total_pending_payout_value"</span><span class="p">:</span><span class="s2">"0.000 SBD"</span><span class="w">
   </span><span class="p">}</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre>
</div>

		</section>
	
		<section id="services-steemconnect" class="row services-steemconnect">
			<h3>
				<a id="services-steemconnect">
					SteemConnect
					
				</a>
			</h3>
			

			<p><em>A Look at the Why’s and How’s of SteemConnect</em></p>

<p><strong>Useful Links</strong></p>

<ul>
  <li><a href="https://github.com/steemit/steemconnect">SteemConnect Repo</a></li>
  <li><a href="/community/#steemconnect">Community Resources</a></li>
</ul>

<p><strong>Why SteemConnect was implemented</strong></p>

<p>The goal of SteemConnect is to provide a safe way of connecting to the blockchain via 3rd party apps without compromising the security of your private keys and passwords. It’s a simple identity layer built on top of the blockchain allowing users safe access and developers the freedom of not having to handle the authentication system, i.e. managing users’ private keys and encryption. This means that devs won’t have to opensource their projects in order to gain user trust. When connecting to apps in this manner, neither SteemConnect nor the authorised app store the private keys as the posting key is incrypted on your cookie.</p>

<p><strong>How SteemConnect is implemented</strong></p>

<p>SteemConnect works by granting an access token to the requesting app once the application has been approved.
A full tutorial on how to set up an application, request authorisation and grant access can be found <a href="/tutorials-javascript/steemconnect">HERE</a></p>

<p><strong>Steem Authorisation and OAuth 2</strong></p>

<p>The OAuth protocol allows third party apps to grant limited access to an HTTP service, either on behalf of a resource owner or by allowing the app to obtain access on its own behalf. The authorisation is provided without the private key or password of the user being shared with the third party.
Simplified, the process includes the following steps:</p>

<ol>
  <li>The user is presented with an authorisation link that requests a token from the API</li>
  <li>The user has to log in to the service to verify their identity whereupon they will be prompted to authorise the application</li>
  <li>The user is redirected to the application redirect URI along with the access token</li>
</ol>

<p>Once the application has an access token, it may use the token to access the user’s account via the API, limited to the scope of access, until the token expires or is revoked.
A full breakdown of OAuth2 and how it applies to SteemIt and SteemConnect can be found <a href="https://github.com/steemit/steemconnect/wiki/OAuth-2#code-authorization-flow">HERE</a></p>

<p>For additional material you can refer to the original steemit <a href="https://steemit.com/steemconnect/@busy.org/introducing-steemconnect-by-busy-identity-authentication-authorization-for-steem-blockchain-s-apps">blog</a> post by <a href="https://busy.org/">busy.org</a></p>

		</section>
	
		<section id="services-jussi" class="row services-jussi">
			<h3>
				<a id="services-jussi">
					jussi
					
				</a>
			</h3>
			
				<p class="description">A reverse proxy that forwards json-rpc requests.</p>
			

			<p>Jussi is a custom-built caching layer for use with <code class="highlighter-rouge">steemd</code> and other various services (such as <a href="/services/#services-sbds">SBDS</a>).</p>

<p>The purpose of this document is to help developers and node operators set up their own jussi node within a docker container.</p>

<h3 id="intro">Intro</h3>

<p>Jussi is a reverse proxy that is situation between the API client and the <code class="highlighter-rouge">steemd</code> server.  It allows node operators to route an API call to nodes that are optimized for the particular call, as if they are all hosted from the same place.</p>

<h3 id="sections">Sections</h3>

<ul>
  <li><a href="#installation">Installation</a></li>
  <li><a href="#adding-upstreams">Adding Upstreams</a></li>
  <li><a href="#benefits-of-jussi">Benefits of jussi</a>
    <ul>
      <li><a href="#time-to-live">TTL</a></li>
      <li><a href="#json-rpc-batch">json-rpc batch</a></li>
    </ul>
  </li>
  <li><a href="#footnotes">Footnotes</a></li>
</ul>

<h3 id="installation">Installation<a style="float: right" href="#sections"><i class="fas fa-chevron-up fa-sm"></i></a></h3>

<h5 id="to-run-jussi-locally">To run <code class="highlighter-rouge">jussi</code> locally:</h5>

<div class="language-bash highlighter-rouge"><pre class="highlight"><code>git clone https://github.com/steemit/jussi.git
<span class="nb">cd </span>jussi
docker build -t<span class="o">=</span><span class="s2">"</span><span class="nv">$USER</span><span class="s2">/jussi:</span><span class="k">$(</span>git rev-parse --abbrev-ref HEAD<span class="k">)</span><span class="s2">"</span> .
docker run -itp 9000:8080 <span class="s2">"</span><span class="nv">$USER</span><span class="s2">/jussi:</span><span class="k">$(</span>git rev-parse --abbrev-ref HEAD<span class="k">)</span><span class="s2">"</span>
</code></pre>
</div>

<p><img src="/images/services-jussi/kitematic-example.png" width="100%" alt="Kitematic Example" />
<small><em>jussi in a docker container as seen from <a href="https://docs.docker.com/docker-for-mac/install/">Kitematic for macOS</a>.</em></small></p>

<h5 id="try-out-your-local-configuration">Try out your local configuration:</h5>

<div class="language-bash highlighter-rouge"><pre class="highlight"><code>curl -s --data <span class="s1">'{"jsonrpc":"2.0", "method":"condenser_api.get_block", "params":[8675309], "id":1}'</span> http://localhost:9000
</code></pre>
</div>

<p>See: <a href="https://steemit.com/steemdev/@maitland/running-condenser-jussi-and-a-new-service-locally-adding-feature-flags-to-condenser">Running Condenser, Jussi and a new service locally + adding feature flags to Condenser</a></p>

<hr />

<h3 id="adding-upstreams">Adding Upstreams<a style="float: right" href="#sections"><i class="fas fa-chevron-up fa-sm"></i></a></h3>

<p>The default <code class="highlighter-rouge">DEV_config.json</code> is:</p>

<div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="w">
   </span><span class="nt">"limits"</span><span class="p">:{</span><span class="nt">"blacklist_accounts"</span><span class="p">:[</span><span class="s2">"non-steemit"</span><span class="p">]},</span><span class="w">
   </span><span class="nt">"upstreams"</span><span class="p">:[</span><span class="w">
      </span><span class="p">{</span><span class="w">
         </span><span class="nt">"name"</span><span class="p">:</span><span class="s2">"steemd"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"translate_to_appbase"</span><span class="p">:</span><span class="kc">false</span><span class="p">,</span><span class="w">
         </span><span class="nt">"urls"</span><span class="p">:[[</span><span class="s2">"steemd"</span><span class="p">,</span><span class="w"> </span><span class="s2">"https://steemd.steemitdev.com"</span><span class="p">]],</span><span class="w">
         </span><span class="nt">"ttls"</span><span class="p">:[</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd"</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.login_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">-1</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.network_broadcast_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">-1</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.follow_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">10</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.market_history_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_block"</span><span class="p">,</span><span class="w"> </span><span class="mi">-2</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_block_header"</span><span class="p">,</span><span class="w"> </span><span class="mi">-2</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_content"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_state"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_state.params=['/trending']"</span><span class="p">,</span><span class="w"> </span><span class="mi">30</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_state.params=['trending']"</span><span class="p">,</span><span class="w"> </span><span class="mi">30</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_state.params=['/hot']"</span><span class="p">,</span><span class="w"> </span><span class="mi">30</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_state.params=['/welcome']"</span><span class="p">,</span><span class="w"> </span><span class="mi">30</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_state.params=['/promoted']"</span><span class="p">,</span><span class="w"> </span><span class="mi">30</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_state.params=['/created']"</span><span class="p">,</span><span class="w"> </span><span class="mi">10</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.database_api.get_dynamic_global_properties"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">]</span><span class="w">
         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"timeouts"</span><span class="p">:[</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd"</span><span class="p">,</span><span class="w"> </span><span class="mi">5</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"steemd.network_broadcast_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">]</span><span class="w">
         </span><span class="p">]</span><span class="w">
      </span><span class="p">},</span><span class="w">
      </span><span class="p">{</span><span class="w">
         </span><span class="nt">"name"</span><span class="p">:</span><span class="s2">"appbase"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"urls"</span><span class="p">:[[</span><span class="s2">"appbase"</span><span class="p">,</span><span class="w"> </span><span class="s2">"https://steemd.steemitdev.com"</span><span class="p">]],</span><span class="w">
         </span><span class="nt">"ttls"</span><span class="p">:[</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase"</span><span class="p">,</span><span class="w"> </span><span class="mi">-2</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.block_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">-2</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.database_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">]</span><span class="w">
         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"timeouts"</span><span class="p">:[</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase"</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.chain_api.push_block"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.chain_api.push_transaction"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.network_broadcast_api"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.condenser_api.broadcast_block"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.condenser_api.broadcast_transaction"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">],</span><span class="w">
            </span><span class="p">[</span><span class="s2">"appbase.condenser_api.broadcast_transaction_synchronous"</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">]</span><span class="w">
         </span><span class="p">]</span><span class="w">
      </span><span class="p">}</span><span class="w">
   </span><span class="p">]</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre>
</div>

<p>Upstreams can be added to the <code class="highlighter-rouge">upstreams</code> array:</p>

<div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="w">
  </span><span class="nt">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"foo"</span><span class="p">,</span><span class="w">
  </span><span class="nt">"urls"</span><span class="p">:</span><span class="w"> </span><span class="p">[[</span><span class="s2">"foo"</span><span class="p">,</span><span class="w"> </span><span class="s2">"https://foo.host.name"</span><span class="p">]],</span><span class="w">
  </span><span class="nt">"ttls"</span><span class="p">:</span><span class="w"> </span><span class="p">[[</span><span class="s2">"foo"</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">]],</span><span class="w">
  </span><span class="nt">"timeouts"</span><span class="p">:</span><span class="w"> </span><span class="p">[[</span><span class="s2">"foo"</span><span class="p">,</span><span class="w"> </span><span class="mi">5</span><span class="p">]]</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre>
</div>

<p>Once the above upstream is added to the local config and docker has been built, the following <code class="highlighter-rouge">curl</code> will work:</p>

<div class="language-bash highlighter-rouge"><pre class="highlight"><code>curl -s --data <span class="s1">'{"jsonrpc":"2.0", "method":"foo.bar", "params":["baz"], "id":1}'</span> http://localhost:9000
</code></pre>
</div>

<h3 id="benefits-of-jussi">Benefits of jussi<a style="float: right" href="#sections"><i class="fas fa-chevron-up fa-sm"></i></a></h3>

<h4 id="time-to-live">Time To Live<a style="float: right" href="#sections"><i class="fas fa-chevron-up fa-sm"></i></a></h4>

<p>Jussi can be configured with various <code class="highlighter-rouge">TTL</code> (Time To Live) schemes. A <code class="highlighter-rouge">TTL</code> is an integer value in seconds.  Integers equal to or less than <code class="highlighter-rouge">0</code> have special meaning.  A reasonable set of defaults would be:</p>

<table>
  <thead>
    <tr>
      <th>Upstream</th>
      <th>API</th>
      <th>Method</th>
      <th>Parameters</th>
      <th>TTL (seconds)</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">login_api</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>-1</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">network_broadcast_api</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>-1</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">follow_api</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>10</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">market_history_api</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>1</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>3</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_block</code></td>
      <td><em>all</em></td>
      <td>-2</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_block_header</code></td>
      <td><em>all</em></td>
      <td>-2</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_content</code></td>
      <td><em>all</em></td>
      <td>1</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_state</code></td>
      <td><em>all</em></td>
      <td>1</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_state</code></td>
      <td><code class="highlighter-rouge">'/trending'</code></td>
      <td>30</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_state</code></td>
      <td><code class="highlighter-rouge">'trending'</code></td>
      <td>30</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_state</code></td>
      <td><code class="highlighter-rouge">'/hot'</code></td>
      <td>30</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_state</code></td>
      <td><code class="highlighter-rouge">'/welcome'</code></td>
      <td>30</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_state</code></td>
      <td><code class="highlighter-rouge">'/promoted'</code></td>
      <td>30</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_state</code></td>
      <td><code class="highlighter-rouge">'/created'</code></td>
      <td>10</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">steemd</code></td>
      <td><code class="highlighter-rouge">database_api</code></td>
      <td><code class="highlighter-rouge">get_dynamic_global_properties</code></td>
      <td><em>all</em></td>
      <td>1</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">overseer</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>5</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">conveyor</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>-1</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">sbds</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>3</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">hivemind</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>3</td>
    </tr>
    <tr>
      <td><code class="highlighter-rouge">yo</code></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td><em>all</em></td>
      <td>3</td>
    </tr>
  </tbody>
</table>

<p>In this case, requests for <code class="highlighter-rouge">login_api</code> and <code class="highlighter-rouge">network_broadcast_api</code> have a <code class="highlighter-rouge">TTL</code> of <code class="highlighter-rouge">-1</code>, which means requests with those namespaces are not cached, whereas <code class="highlighter-rouge">follow_api</code> request have a <code class="highlighter-rouge">TTL</code> of <code class="highlighter-rouge">10</code> seconds.</p>

<p>Some methods and parameters have their own <code class="highlighter-rouge">TTL</code> that overrides the general default, like <code class="highlighter-rouge">database_api.get_block</code>, which overrides <code class="highlighter-rouge">database_api.*</code>.</p>

<h5 id="time-to-live-special-meaning">Time to Live Special Meaning</h5>

<ul>
  <li><code class="highlighter-rouge">0</code> won’t expire</li>
  <li><code class="highlighter-rouge">-1</code> won’t be cached</li>
  <li><code class="highlighter-rouge">-2</code> will be cached without expiration only if it is <code class="highlighter-rouge">irreversible</code> in terms of blockchain consensus</li>
</ul>

<p>If you have a local copy of jussi (see: <a href="#installation">Installation</a>), you can change these defaults by modifying <code class="highlighter-rouge">DEV_config.json</code>.</p>

<h4 id="json-rpc-batch">json-rpc batch<a style="float: right" href="#sections"><i class="fas fa-chevron-up fa-sm"></i></a></h4>

<p>Normally, a request is made with a JSON Object (<code class="highlighter-rouge"><span class="p">{}</span></code>).  But jussi also supports batch requests, which is constructed with a JSON Array of Objects (<code class="highlighter-rouge">[{}]</code>).</p>

<p>For example, this would be a typical, non-batched JSON Object request that asks for a single block:</p>

<div class="language-bash highlighter-rouge"><pre class="highlight"><code>curl -s --data <span class="s1">'{"jsonrpc":"2.0", "method":"condenser_api.get_block", "params":[1], "id":1}'</span> https://api.steemit.com
</code></pre>
</div>

<div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="w">
   </span><span class="nt">"id"</span><span class="p">:</span><span class="mi">1</span><span class="p">,</span><span class="w">
   </span><span class="nt">"jsonrpc"</span><span class="p">:</span><span class="s2">"2.0"</span><span class="p">,</span><span class="w">
   </span><span class="nt">"result"</span><span class="p">:{</span><span class="w">
      </span><span class="nt">"previous"</span><span class="p">:</span><span class="s2">"0000000000000000000000000000000000000000"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"timestamp"</span><span class="p">:</span><span class="s2">"2016-03-24T16:05:00"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"witness"</span><span class="p">:</span><span class="s2">"initminer"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"transaction_merkle_root"</span><span class="p">:</span><span class="s2">"0000000000000000000000000000000000000000"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"extensions"</span><span class="p">:[</span><span class="w">

      </span><span class="p">],</span><span class="w">
      </span><span class="nt">"witness_signature"</span><span class="p">:</span><span class="s2">"204f8ad56a8f5cf722a02b035a61b500aa59b9519b2c33c77a80c0a714680a5a5a7a340d909d19996613c5e4ae92146b9add8a7a663eef37d837ef881477313043"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"transactions"</span><span class="p">:[</span><span class="w">

      </span><span class="p">],</span><span class="w">
      </span><span class="nt">"block_id"</span><span class="p">:</span><span class="s2">"0000000109833ce528d5bbfb3f6225b39ee10086"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"signing_key"</span><span class="p">:</span><span class="s2">"STM8GC13uCZbP44HzMLV6zPZGwVQ8Nt4Kji8PapsPiNq1BK153XTX"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"transaction_ids"</span><span class="p">:[</span><span class="w">

      </span><span class="p">]</span><span class="w">
   </span><span class="p">}</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre>
</div>

<p>To request more than one block using the batch construct, wrap each call in a JSON Array, that asks for two blocks in one request:</p>

<div class="language-bash highlighter-rouge"><pre class="highlight"><code>curl -s --data <span class="s1">'[{"jsonrpc":"2.0", "method":"condenser_api.get_block", "params":[1], "id":1},{"jsonrpc":"2.0", "method":"condenser_api.get_block", "params":[2], "id":2}]'</span> https://api.steemit.com
</code></pre>
</div>

<div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">[</span><span class="w">
   </span><span class="p">{</span><span class="w">
      </span><span class="nt">"id"</span><span class="p">:</span><span class="mi">1</span><span class="p">,</span><span class="w">
      </span><span class="nt">"jsonrpc"</span><span class="p">:</span><span class="s2">"2.0"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"result"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"previous"</span><span class="p">:</span><span class="s2">"0000000000000000000000000000000000000000"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"timestamp"</span><span class="p">:</span><span class="s2">"2016-03-24T16:05:00"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"witness"</span><span class="p">:</span><span class="s2">"initminer"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transaction_merkle_root"</span><span class="p">:</span><span class="s2">"0000000000000000000000000000000000000000"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"extensions"</span><span class="p">:[</span><span class="w">

         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"witness_signature"</span><span class="p">:</span><span class="s2">"204f8ad56a8f5cf722a02b035a61b500aa59b9519b2c33c77a80c0a714680a5a5a7a340d909d19996613c5e4ae92146b9add8a7a663eef37d837ef881477313043"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transactions"</span><span class="p">:[</span><span class="w">

         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"block_id"</span><span class="p">:</span><span class="s2">"0000000109833ce528d5bbfb3f6225b39ee10086"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"signing_key"</span><span class="p">:</span><span class="s2">"STM8GC13uCZbP44HzMLV6zPZGwVQ8Nt4Kji8PapsPiNq1BK153XTX"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transaction_ids"</span><span class="p">:[</span><span class="w">

         </span><span class="p">]</span><span class="w">
      </span><span class="p">}</span><span class="w">
   </span><span class="p">},</span><span class="w">
   </span><span class="p">{</span><span class="w">
      </span><span class="nt">"id"</span><span class="p">:</span><span class="mi">2</span><span class="p">,</span><span class="w">
      </span><span class="nt">"jsonrpc"</span><span class="p">:</span><span class="s2">"2.0"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"result"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"previous"</span><span class="p">:</span><span class="s2">"0000000109833ce528d5bbfb3f6225b39ee10086"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"timestamp"</span><span class="p">:</span><span class="s2">"2016-03-24T16:05:36"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"witness"</span><span class="p">:</span><span class="s2">"initminer"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transaction_merkle_root"</span><span class="p">:</span><span class="s2">"0000000000000000000000000000000000000000"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"extensions"</span><span class="p">:[</span><span class="w">

         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"witness_signature"</span><span class="p">:</span><span class="s2">"1f3e85ab301a600f391f11e859240f090a9404f8ebf0bf98df58eb17f455156e2d16e1dcfc621acb3a7acbedc86b6d2560fdd87ce5709e80fa333a2bbb92966df3"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transactions"</span><span class="p">:[</span><span class="w">

         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"block_id"</span><span class="p">:</span><span class="s2">"00000002ed04e3c3def0238f693931ee7eebbdf1"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"signing_key"</span><span class="p">:</span><span class="s2">"STM8GC13uCZbP44HzMLV6zPZGwVQ8Nt4Kji8PapsPiNq1BK153XTX"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transaction_ids"</span><span class="p">:[</span><span class="w">

         </span><span class="p">]</span><span class="w">
      </span><span class="p">}</span><span class="w">
   </span><span class="p">}</span><span class="w">
</span><span class="p">]</span><span class="w">
</span></code></pre>
</div>

<p>Error responses are returned in the JSON Array response as well.  Notice the <code class="highlighter-rouge">"WRONG"</code> parameter in the second element.  The first block is returned as expected, the second one generates an error.</p>

<div class="language-bash highlighter-rouge"><pre class="highlight"><code>curl -s --data <span class="s1">'[{"jsonrpc":"2.0", "method":"condenser_api.get_block", "params":[1], "id":1},{"jsonrpc":"2.0", "method":"condenser_api.get_block", "params":["WRONG"], "id":2}]'</span> https://api.steemit.com
</code></pre>
</div>

<div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">[</span><span class="w">
   </span><span class="p">{</span><span class="w">
      </span><span class="nt">"jsonrpc"</span><span class="p">:</span><span class="s2">"2.0"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"result"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"previous"</span><span class="p">:</span><span class="s2">"0000000000000000000000000000000000000000"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"timestamp"</span><span class="p">:</span><span class="s2">"2016-03-24T16:05:00"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"witness"</span><span class="p">:</span><span class="s2">"initminer"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transaction_merkle_root"</span><span class="p">:</span><span class="s2">"0000000000000000000000000000000000000000"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"extensions"</span><span class="p">:[</span><span class="w">

         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"witness_signature"</span><span class="p">:</span><span class="s2">"204f8ad56a8f5cf722a02b035a61b500aa59b9519b2c33c77a80c0a714680a5a5a7a340d909d19996613c5e4ae92146b9add8a7a663eef37d837ef881477313043"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transactions"</span><span class="p">:[</span><span class="w">

         </span><span class="p">],</span><span class="w">
         </span><span class="nt">"block_id"</span><span class="p">:</span><span class="s2">"0000000109833ce528d5bbfb3f6225b39ee10086"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"signing_key"</span><span class="p">:</span><span class="s2">"STM8GC13uCZbP44HzMLV6zPZGwVQ8Nt4Kji8PapsPiNq1BK153XTX"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"transaction_ids"</span><span class="p">:[</span><span class="w">

         </span><span class="p">]</span><span class="w">
      </span><span class="p">},</span><span class="w">
      </span><span class="nt">"id"</span><span class="p">:</span><span class="mi">1</span><span class="w">
   </span><span class="p">},</span><span class="w">
   </span><span class="p">{</span><span class="w">
      </span><span class="nt">"jsonrpc"</span><span class="p">:</span><span class="s2">"2.0"</span><span class="p">,</span><span class="w">
      </span><span class="nt">"error"</span><span class="p">:{</span><span class="w">
         </span><span class="nt">"code"</span><span class="p">:</span><span class="mi">-32000</span><span class="p">,</span><span class="w">
         </span><span class="nt">"message"</span><span class="p">:</span><span class="s2">"Parse Error:Couldn't parse uint64_t"</span><span class="p">,</span><span class="w">
         </span><span class="nt">"data"</span><span class="p">:{</span><span class="w">
            </span><span class="nt">"code"</span><span class="p">:</span><span class="mi">4</span><span class="p">,</span><span class="w">
            </span><span class="nt">"name"</span><span class="p">:</span><span class="s2">"parse_error_exception"</span><span class="p">,</span><span class="w">
            </span><span class="nt">"message"</span><span class="p">:</span><span class="s2">"Parse Error"</span><span class="p">,</span><span class="w">
            </span><span class="nt">"stack"</span><span class="p">:[</span><span class="w">
               </span><span class="p">{</span><span class="w">
                  </span><span class="nt">"context"</span><span class="p">:{</span><span class="w">
                     </span><span class="nt">"level"</span><span class="p">:</span><span class="s2">"error"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"file"</span><span class="p">:</span><span class="s2">"string.cpp"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"line"</span><span class="p">:</span><span class="mi">113</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"method"</span><span class="p">:</span><span class="s2">"to_uint64"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"hostname"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"timestamp"</span><span class="p">:</span><span class="s2">"2018-05-21T18:02:41"</span><span class="w">
                  </span><span class="p">},</span><span class="w">
                  </span><span class="nt">"format"</span><span class="p">:</span><span class="s2">"Couldn't parse uint64_t"</span><span class="p">,</span><span class="w">
                  </span><span class="nt">"data"</span><span class="p">:{</span><span class="w">

                  </span><span class="p">}</span><span class="w">
               </span><span class="p">},</span><span class="w">
               </span><span class="p">{</span><span class="w">
                  </span><span class="nt">"context"</span><span class="p">:{</span><span class="w">
                     </span><span class="nt">"level"</span><span class="p">:</span><span class="s2">"warn"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"file"</span><span class="p">:</span><span class="s2">"string.cpp"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"line"</span><span class="p">:</span><span class="mi">116</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"method"</span><span class="p">:</span><span class="s2">"to_uint64"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"hostname"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"timestamp"</span><span class="p">:</span><span class="s2">"2018-05-21T18:02:41"</span><span class="w">
                  </span><span class="p">},</span><span class="w">
                  </span><span class="nt">"format"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="w">
                  </span><span class="nt">"data"</span><span class="p">:{</span><span class="w">
                     </span><span class="nt">"i"</span><span class="p">:</span><span class="s2">"WRONG"</span><span class="w">
                  </span><span class="p">}</span><span class="w">
               </span><span class="p">},</span><span class="w">
               </span><span class="p">{</span><span class="w">
                  </span><span class="nt">"context"</span><span class="p">:{</span><span class="w">
                     </span><span class="nt">"level"</span><span class="p">:</span><span class="s2">"warn"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"file"</span><span class="p">:</span><span class="s2">"variant.cpp"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"line"</span><span class="p">:</span><span class="mi">405</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"method"</span><span class="p">:</span><span class="s2">"as_uint64"</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"hostname"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="w">
                     </span><span class="nt">"timestamp"</span><span class="p">:</span><span class="s2">"2018-05-21T18:02:41"</span><span class="w">
                  </span><span class="p">},</span><span class="w">
                  </span><span class="nt">"format"</span><span class="p">:</span><span class="s2">""</span><span class="p">,</span><span class="w">
                  </span><span class="nt">"data"</span><span class="p">:{</span><span class="w">
                     </span><span class="nt">"*this"</span><span class="p">:</span><span class="s2">"WRONG"</span><span class="w">
                  </span><span class="p">}</span><span class="w">
               </span><span class="p">}</span><span class="w">
            </span><span class="p">]</span><span class="w">
         </span><span class="p">}</span><span class="w">
      </span><span class="p">},</span><span class="w">
      </span><span class="nt">"id"</span><span class="p">:</span><span class="mi">2</span><span class="w">
   </span><span class="p">}</span><span class="w">
</span><span class="p">]</span><span class="w">
</span></code></pre>
</div>

<h3 id="footnotes">Footnotes<a style="float: right" href="#sections"><i class="fas fa-chevron-up fa-sm"></i></a></h3>

<ul>
  <li>Batch requests are limited to a maximum of 50 request elements.
    <ul>
      <li><em>Also see: <a href="http://www.jsonrpc.org/specification#batch">json-rpc batch specification</a></em></li>
    </ul>
  </li>
  <li>Repository: <a href="https://github.com/steemit/jussi">github.com/steemit/jussi</a></li>
</ul>

<hr />

<p><em>Latin</em></p>

<blockquote>
  <div class="highlighter-rouge"><pre class="highlight"><code>jussi

noun

declension: 2nd declension
gender: neuter

Definitions:
  1. order, command, decree, ordinance, law
</code></pre>
  </div>
</blockquote>

		</section>
	
		<section id="services-imagehoster" class="row services-imagehoster">
			<h3>
				<a id="services-imagehoster">
					ImageHoster
					
				</a>
			</h3>
			

			<h1 id="definition">Definition</h1>

<p>Imagehoster is a Steem-powered image hosting and proxying service. Any image uploaded to, or proxied through, your Imagehoster has a copy stored within it. This means that the image continues to be available even if 3rd party sites go down or change their URLs. For as long as your instance of imagehoster is running the image will be available, anytime you need it.</p>

<p>Detaied information on Imagehoster can be found in its <a href="https://github.com/steemit/imagehoster/blob/master/README.md">repository</a></p>

<h2 id="the-api">The API</h2>

<p>Below are examples of how to process images with the API</p>

<ol>
  <li><a href="#upload-image"><strong>Upload an image</strong></a></li>
  <li><a href="#fetch-upload"><strong>Fetch an uploaded image</strong></a></li>
  <li><a href="#proxy-resize"><strong>Proxy and resize an image</strong></a></li>
  <li><a href="#user-avatar"><strong>Get user avatar image</strong></a></li>
  <li><a href="#signing"><strong>Signing uploads</strong></a></li>
  <li><a href="#how-to-run"><strong>How to run</strong></a></li>
</ol>

<h4 id="1-upload-an-image-">1. Upload an image <a name="upload-image"></a></h4>

<p><code class="highlighter-rouge">POST /&lt;username&gt;/&lt;signature&gt;</code></p>

<p>This returns a JSON object container the URL to the uploaded image, ex:</p>

<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="w">
    </span><span class="nt">"url"</span><span class="p">:</span><span class="w"> </span><span class="s2">"https://images.example.com/DQmZi174Xz96UrRVBMNRHb6A2FfU3z1HRPwPPQCgSMgdiUT/test.jpg"</span><span class="w">
</span><span class="p">}</span><span class="w">
</span></code></pre>
</div>

<p>For this to succeed it requires a signature from a Steem account in good standing.</p>

<h4 id="2-fetch-an-uploaded-image-">2. Fetch an uploaded image <a name="fetch-upload"></a></h4>

<p><code class="highlighter-rouge">GET /&lt;image_hash&gt;/&lt;filename&gt;</code></p>

<p>This downloads a previously uploaded image.</p>

<p><code class="highlighter-rouge">&lt;filename&gt;</code> is optional but can be provided to help users and applications understand the content type (Content-Type header will still always reflect actual image type)</p>

<h4 id="3-proxy-and-resize-an-image-">3. Proxy and resize an image <a name="proxy-resize"></a></h4>

<p><code class="highlighter-rouge">GET /&lt;width&gt;x&lt;hight&gt;/&lt;image_url&gt;</code></p>

<p>This downloads and serves the provided <code class="highlighter-rouge">image_url</code>. Something to note is that a copy will be taken of the image and will be served on subsequent requests, so even if the upstream is removed or changes, you will still get the original from the proxy endpoint.</p>

<p><code class="highlighter-rouge">&lt;width&gt;</code> and <code class="highlighter-rouge">&lt;height&gt;</code> can be set to <code class="highlighter-rouge">0</code> to preserve the image’s dimensions, if they are <code class="highlighter-rouge">&gt;0</code> the image will be aspect resized (down-sample only) to fit.</p>

<h4 id="4-get-user-avatar-image-">4. Get user avatar image <a name="user-avatar"></a></h4>

<p><code class="highlighter-rouge">GET /u/&lt;username&gt;/avatar/&lt;size&gt;</code></p>

<p>This presents the avatar for <code class="highlighter-rouge">username</code>. If no avatar is set, a default image will be served. This default is set in the service config.</p>

<p>The sizes are:</p>
<ul>
  <li>small - 64x64</li>
  <li>medium - 128x128</li>
  <li>large - 512x512</li>
</ul>

<p>The avatars follow the same sizing rules as proxied images, so you not guaranteed to get a square image, just an image fitting inside of the <code class="highlighter-rouge">size</code> square</p>

<h4 id="5-signing-uploads-">5. Signing uploads <a name="signing"></a></h4>

<p>Uploads also require a signature made by a Steem account’s posting authority. The account has to also be above a certain (service configurable) reputation threshold.</p>

<p>Creating a signature for <code class="highlighter-rouge">node.js</code> and with <code class="highlighter-rouge">dsteem</code>:</p>

<div class="language-javascript highlighter-rouge"><pre class="highlight"><code><span class="kr">const</span> <span class="nx">dsteem</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">'dsteem'</span><span class="p">)</span>
<span class="kr">const</span> <span class="nx">crypto</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">'crypto'</span><span class="p">)</span>
<span class="kr">const</span> <span class="nx">fs</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">'fs'</span><span class="p">)</span>

<span class="kr">const</span> <span class="p">[</span><span class="nx">wif</span><span class="p">,</span> <span class="nx">file</span><span class="p">]</span> <span class="o">=</span> <span class="nx">process</span><span class="p">.</span><span class="nx">argv</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>

<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">wif</span> <span class="o">||</span> <span class="o">!</span><span class="nx">file</span><span class="p">)</span> <span class="p">{</span>
    <span class="nx">process</span><span class="p">.</span><span class="nx">stderr</span><span class="p">.</span><span class="nx">write</span><span class="p">(</span><span class="err">`</span><span class="nx">Usage</span><span class="err">:</span> <span class="p">.</span><span class="o">/</span><span class="nx">sign</span><span class="p">.</span><span class="nx">js</span> <span class="o">&lt;</span><span class="nx">posting_wif</span><span class="o">&gt;</span> <span class="o">&lt;</span><span class="nx">file</span><span class="o">&gt;</span><span class="err">\</span><span class="nx">n</span><span class="err">`</span><span class="p">)</span>
    <span class="nx">process</span><span class="p">.</span><span class="nx">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="p">}</span>

<span class="kr">const</span> <span class="nx">data</span> <span class="o">=</span> <span class="nx">fs</span><span class="p">.</span><span class="nx">readFileSync</span><span class="p">(</span><span class="nx">file</span><span class="p">)</span>
<span class="kr">const</span> <span class="nx">key</span> <span class="o">=</span> <span class="nx">dsteem</span><span class="p">.</span><span class="nx">PrivateKey</span><span class="p">.</span><span class="nx">fromString</span><span class="p">(</span><span class="nx">wif</span><span class="p">)</span>
<span class="kr">const</span> <span class="nx">imageHash</span> <span class="o">=</span> <span class="nx">crypto</span><span class="p">.</span><span class="nx">createHash</span><span class="p">(</span><span class="s1">'sha256'</span><span class="p">)</span>
    <span class="p">.</span><span class="nx">update</span><span class="p">(</span><span class="s1">'ImageSigningChallenge'</span><span class="p">)</span>
    <span class="p">.</span><span class="nx">update</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span>
    <span class="p">.</span><span class="nx">digest</span><span class="p">()</span>

<span class="nx">process</span><span class="p">.</span><span class="nx">stdout</span><span class="p">.</span><span class="nx">write</span><span class="p">(</span><span class="nx">key</span><span class="p">.</span><span class="nx">sign</span><span class="p">(</span><span class="nx">imageHash</span><span class="p">).</span><span class="nx">toString</span><span class="p">()</span> <span class="o">+</span> <span class="s1">'\n'</span><span class="p">)</span>
</code></pre>
</div>

<h4 id="6-how-to-run-">6. How to run <a name="how-to-run"></a></h4>

<p>This imagehoster demo must be run through linux due to a dependency on the <code class="highlighter-rouge">make</code> commandline.
You will also require <code class="highlighter-rouge">node.js</code> and <code class="highlighter-rouge">yarn</code> to run</p>

<ul>
  <li>
    <p>git clone https://github.com/steemit/imagehoster</p>
  </li>
  <li>
    <p>Run <code class="highlighter-rouge">make devserver</code></p>
  </li>
</ul>

<p>This will pull in all dependencies and spin up a hot-reloading development server. From there the HTTP methods can be used to alter the image loaded from the &lt;./test&gt; module.</p>

<ul>
  <li>Run <code class="highlighter-rouge">make lint</code> to load the autolinter.</li>
  <li>Run <code class="highlighter-rouge">make test</code> to run the unit tests for the active functions.</li>
</ul>

<p>Default configuration variables are in &lt;./config/defailt.toml&gt; and can be overridden by environment variables as definded in &lt;./config/custom-enfironment-variables.toml&gt;</p>

<p>The load order for the config files are: env vars &gt; <code class="highlighter-rouge">config/$NODE_ENV.toml</code> &gt; <code class="highlighter-rouge">config/default.toml</code></p>

		</section>
	
		<section id="services-sbds" class="row services-sbds">
			<h3>
				<a id="services-sbds">
					SBDS
					
				</a>
			</h3>
			

			<p><strong>sbds</strong> is a tool for easily querying the data of the Steem Blockchain.</p>

<p>While providing direct interfaces to several pluggable storage architectures that may be used for querying the blockchain, sbds may also be used as a lower level API upon which other applications can be built.</p>

<p><strong>Docker Hub</strong></p>

<div class="highlighter-rouge"><pre class="highlight"><code>docker run -d steemit/sbds
</code></pre>
</div>

<p><strong>Python 3</strong></p>
<div class="highlighter-rouge"><pre class="highlight"><code>pip3 install -e git+git@github.com:steemit/sbds.git#egg=sbds
</code></pre>
</div>

<p><strong>Examples</strong></p>

<p>Stream blocks 1 to 3450000 from our dev S3 bucket</p>
<div class="highlighter-rouge"><pre class="highlight"><code>sbds checkpoints get-blocks s3://steemit-dev-sbds-checkpoints/gzipped --start 1 --end 3450000
</code></pre>
</div>

<p>Stream blocks 8000000 to the last block from your local copy of our S3 bucket</p>
<div class="highlighter-rouge"><pre class="highlight"><code>sbds checkpoints get-blocks /home/ubuntu/checkpoints/gzipped --start 8000000
</code></pre>
</div>

<p>Stream all blocks from your local copy of our S3 bucket</p>

<div class="highlighter-rouge"><pre class="highlight"><code>sbds checkpoints get-blocks /home/ubuntu/checkpoints/gzipped
</code></pre>
</div>

<p><strong>Routes</strong></p>

<p>Coming soon.</p>

		</section>
	


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